Vector2 positionDelta(const PhysicsEntity*, float);
Vector2 velocityDelta(const PhysicsEntity*, float);
Vector2 forceDelta(const PhysicsEntity*, float);
Vector2 positionDelta(const PhysicsEntity*, float);
Vector2 velocityDelta(const PhysicsEntity*, float);
Vector2 forceDelta(const PhysicsEntity*, float);